Features: 1. Independent Sound Chambers with 10MM Titanium Film Drivers——Produces accurate vocals, powerful low frequencies and balanced mid frequencies. 2. Portable charger with built-in large capacity battery: Coming with 2600mAh charger combines with portable storage, ultra-convenient to charge the earphones and store. 3. Ergonomical design, ultra-lightweight, free of burden with long time wearing, the eye-catching is extremely durable and anti-wear. 4. Bluetooth V5.0 & 10M Obstacle-free Connection——Releasing the hands and enables you to get rid of the wired constraint. 5. Easy To Use——When removed from the charging box, the earbuds automatically power on and connect to the previously paired device. They will also automatically turn off when placed back into the charging box. 6. IPX6 waterproof, enjoy sports as much as you like.